FAMILY LYMN^ID^E 8 1 



Orbis SCHROTER, Journ. Steinr. u. Konch., in, p. 10, 1776, an error of cita- 



tion for Planorbis Argenville. 

 Vortex Anonymous in Mus. Calonn., p. 58, 1797, Helix cornea Linn6. Not 



Vortex Oken, 1815. 

 < Anisus STUDER, Syst. Verz., p. 23, 1820 (= Planorbis + Physa). 



> Anisus FITZINGER, Verz., p. in, 1833; not of Dujardin, 1821. 

 f Cornu SCHUMACHER, Essai, p. 255, 1817, not of Born, 1778. 



> Spiralina H ARTM ANN, Syst. Uebers., tab. 1840. (Nude name.) No type 



cited. 



Planorbarius DUMERIL, Zool. Anal., p. 164, 1806. 

 Corettis GRAY (not Adanson), P. Z. S., 1847, p. 180, P. corneus L. MRS. 



GRAY, Figs. Moll. An., iv, p. 119, 1850. MOQUIN TANDON, Moll. Terr. 



et Fluv., u, p. 423, 1855. GRAY'S Turton's Man., ed. n, p. 233, 



1857. 

 Spirodiscus STEIN, Schn. u. Muscheln Berlins, p. 73, 1850. MORCH, Vidensk. 



Meddels. Kjobn., 1864, p. 309. WESTERLUND, Acta Soc. Fauna Fen- 



nica, xni, No. 7, p. 112, 1897 ; Acta Acad. Sci. Slav. Merid., Zagrabiae, 



CLI, p. 1 20, 1902 ; S. corneus (Linne). 

 Tropidiscus WESTERLUND, Fauna Pal. Reg.,v, p. 65, 1885, not of Stein; 



Acta. Acad. Sci. Slav. Merid., Zagrabias, CLI, p. 120, 1902 ; Helix plan- 



orbis Linn6. 

 f Caillaudia BOURGUIGNAT, Hist. Mai. de l'Abyssini6, p. 128, 1883 ; ist sp. 



C. angulata Bourg., pi. vin, figs. 49-52, op, cit. WESTERLUND, Acta 



Acad. Sci. Slav. Merid., Zagrabiae, CLI, p. 139, 1902 (a deformed or 



monstrous form of Planorbis). 



Subgenus Planorbis s.s. 



Type Planorbis corneus Miiller. 



(Synonymy of the group given under the generic name.) 



Section PLANORBINA Haldeman. 



Planorbina HALDEMAN, Mon. Limn., Physada, p. 14, 1842, no type cited. 

 Menetus FISCHER, Man., p. 509, 1883; P. guadeloupensis Sowerby ; not 



Menetus Adams, 1855. 

 Anisus GRAY, P. Z. S., 1847, p. 181 ; P. olivaceus Spix ; not Anisus Studer, 



1820. 



Subgenus Helisoma Swainson. 



Helisoma SWAINSON, Malac., p. 337, 1840 ; P. bicarinatus Sowerby. 

 Taphius H. and A. ADAMS, Gen. Rec. Moll., n, p. 262, 1855 ; P. andecolus 



Orbigny. 



f Anisopsis SANDBERGER, Land u. Siissw. Conch, d. Vorwelt, p. 958, 1875 ' p - 

 ., and P. calculus Sandb., Jurassic. 



Section PIEROSOMA Dall, nov. 

 Helisoma (sp.) Auct., not of Swainson ; P. trivolvis Say. 



Section PLANORBELLA Haldeman. 



Planorbella HALDEMAN, Mon. Limn., Physadce, p. 14, 1842 ; P. campanulatus 

 Say. 



